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Commit 59cd09e1 authored by Jesse Barnes's avatar Jesse Barnes Committed by Keith Packard
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drm/i915/dp: read more receiver capability bits on hotplug 



When a hotplug event is received, we need to check the receiver cap bits
in case they've changed (as they might with a hub or chain config).

Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: default avatarKeith Packard <keithp@keithp.com>
Signed-off-by: default avatarKeith Packard <keithp@keithp.com>
parent 7183dc29

drivers/gpu/drm/i915/intel_dp.c

+11 −0
Original line number Diff line number Diff line
@@ -1522,6 +1522,8 @@ intel_dp_link_down(struct intel_dp *intel_dp) 
static void

intel_dp_check_link_status(struct intel_dp *intel_dp)

{

	int ret;



	if (!intel_dp->base.base.crtc)

		return;
@@ -1530,6 +1532,15 @@ intel_dp_check_link_status(struct intel_dp *intel_dp) 
		return;

	}



	/* Try to read receiver status if the link appears to be up */

	ret = intel_dp_aux_native_read(intel_dp,

				       0x000, intel_dp->dpcd,

				       sizeof (intel_dp->dpcd));

	if (ret != sizeof(intel_dp->dpcd)) {

		intel_dp_link_down(intel_dp);

		return;

	}



	if (!intel_channel_eq_ok(intel_dp)) {

		intel_dp_start_link_train(intel_dp);

		intel_dp_complete_link_train(intel_dp);